"so, why aren't they folksongs ?"
look at the 1954 definition, then you will find in numerous threads WHEREIN everybody disagrees as to what a modern folk song is,iF we go by 1954 definition this includes some of the chants of football crowds.are EFDDS seriously going to promote that, or are they going to encourage some other modern songs and on what other basis other than the 1954 definition will they decide what a modern folk song is., and if they do they need to revise their definition, if they wish to exclude football chants.
defining modern folk songs is an intellectual minefield.
EFDSS IMO should be Promoting traditional song and dance and spending more money on the promotion of this.
Let ALL modern composed songs be   promoted by songwriting associations such as PRS.